Official 1981-2010 Climate Normals City: SHAWNEETOWN OLD TOWN State: IL ID: 117859 Latitude: 37.6978 Longitude: -88.1336 Elevation: 350.0 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 3.07 3.43 4.52 3.98 5.14 4.03 4.02 2.87 2.73 3.15 4.30 4.01 Snow: 3.8 3.2 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.3 Number of Days P001: 8.0 8.6 10.3 10.0 10.1 8.1 7.9 6.1 5.7 7.3 9.1 9.9 P010: 5.7 6.5 7.7 7.3 8.1 6.1 5.8 4.8 4.7 5.9 7.2 7.0 P100: 0.8 0.9 1.4 1.0 1.4 1.0 1.2 0.8 0.8 0.9 1.3 1.1 S001: 1.9 1.9 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5 S010: 1.3 1.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 S100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 45.25 inches Snowfall: 9.9 inches Days precipitation at or above 0 inches (P000): 101.1 Days precipitation at or above 0.10 inches (P010): 76.8 Days Precipitation at or above 1.00 inches (P100): 12.6 Days Snowfall at or above 0.1 inches (S001): 5.8 Days Snowfall at or above 1.0 inches (S010): 3.6 Days Snowfall at or above 10.0 inches (S100): 0.0 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ KEY: High - average daily high temperature, degrees F Mean - average daily mean temperature, degrees F Low - average daily low temperature, degrees F CDD - cooling degree days, base 50F HDD - heating degree days, base 50F T090 - number of Days with Temperatures above 90 degrees F T100 - number of Days with Temperatures above 100 degrees F T000 - number of Days with Temperatures below 0 degrees F T032 - number of Days with Temperatures below 32 degrees F Prcp - precipitation, inches Snow - snowfall, inches P001 - number of Days with Precipitation of 0.01 inches or more P010 - number of Days with Precipitation of 0.10 inches or more P100 - number of Days with Precipitation of 1.00 inches or more S001 - number of Days with Snowfall of 0.1 inches or more S010 - number of Days with Snowfall of 1.0 inches or more S100 - number of Days with Snowfall of 10.0 inches or more Page Source: Dr. Jim Angel, State Climatologist Illinois State Water Survey Prairie Research Institute University of Illinois Data Source: NOAA National Climatic Data Center